The Lewis electron-dot structure of oxygen has how many dots?

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{3.13 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{3.13}{6.02} \\ = 0.519933[/tex]

We have the final answer as

Hope this helps you

Answer:

lotion 2. capsule 3. suspension 1.

Explanation:

option B is the correct answer, 1.67g/mL.

hope this helps you.

Answer:

methanol because it is liquid at room temperature which means that it melts at a lower temperature

Silicon dioxide is a solid at room temperature and methanol is a liquid. Silicon dioxide has a higher melting point than methanol because silicon dioxide is solid, and with increasing temperature, it will melt.

Melting point is that point or temperature at which the solid items are converted into liquid, and it changes their atoms and the atoms lose their compactness.

Here, two compounds are given, Silicon dioxide and methanol, the first one is solid at room temperature, so it will need more temperature to melt down and methanol is still liquid at room temperature, so its melting point is low.

Thus, methanol is a liquid while silicon dioxide is a solid at ambient temperature. Because silicon dioxide is a solid and melts at greater temperatures, it has a higher melting point than methanol.

To learn more about melting point, refer to the link:

https://brainly.com/question/20551307

#SPJ2

Answer:

Ammonia and Hydrogen Chloride.

Explanation:

Assuming this is what you're referring to, Ammonia (NH3) and Hydrogen Chloride(NCI3). The concentrated ammonia (NH3) is placed on a pad in one end of a tube and hydrochloric acid (NCI3) on a pad at the other. Shortly after the gases will begin diffusing far enough to meet, a ring of solid ammonium chloride (NH4Cl) will be formed.

Ferrus is a transition metal.

FeCl_2

Electronic configuration is given by

[tex]\\ \sf\longmapsto [Fe]^{2+}=1s^22s^22p^63s^23p^64s^23d^4[/tex]

FeCl_3

Electronic configuration is given by

[tex]\\ \sf\longmapsto [Fe]^{3+}=1s^22s^22p^63s^23p^64s^23d^3[/tex]

Fat is a energy giving , protective food

hope it helps

I give my best answer almost

Answer:

D. From the equator to cooler parts of Earth

Explanation:

Thermal energy is always transferred from an area with a higher temperature to an area with a lower temperature. Moving particles transfer thermal energy through a fluid by forming convection currents.

Answer:

B. From the surface of the ocean to the bottom

D. From the equator to cooler parts of Earth

Explanation:

Test approved

Answer:

1.92402 kilohertz

Explanation:

hope this helps

Answer:

• From wave equation :

[tex]{ \rm{v = f \lambda}}[/tex]

[tex]{ \rm{3.0 \times {10}^{8} = (1.89 \times {10}^{18}) \times \lambda}} \\ \\ { \rm{ \lambda = \frac{3.0 \times {10}^{8} }{1.89 \times {10}^{18} } }} \\ \\ { \boxed{ \rm{ \: \lambda = 1.587 \times {10}^{ - 10} \: }}}[/tex]

Answer:

25

Explanation: They all add up to 25 Atoms

The atomic number of nitrogen is 7 and that of oxygen is 8. Atomic number of hydrogen is one and the atomic number of sulphur is 16. Then, the sum of  atomic numbers of each element present in the reactants of the given formula is 32.

The atomic number of an atom is the number of electrons in its neutral state. This number is equal to the number of protons also. The modern periodic table classify all elements based on their atomic numbers.

The sum of number of protons and neutrons of an element is called its mass number. For the given formula, the elements present are H, O, N and S.

atomic number of H = 1

atomic numebr of N = 7

atomic number of O =8

atomic number of S = 16.

Then ,sum of atomic number s= 1 + 7 + 8 + 16 = 32.

Therefore, the sum of the atomic numbers of each element present in the reactants of the given formula is 32.

Find more on atomic number:

https://brainly.com/question/16858932

#SPJ3

Answer:

group 1 element 6

group 2 element 3

group 11 element 1

group 14 element 2

group 17 element 4

group 18 element 5

Explanation:

Answer:

Explanation:

group 1 element 6

group 2 element 3

group 11 element 1

group 14 element 2

group 17 element 4

group 18 element 5

Explanation:

Calcium gives valence electrons to both chlorine atoms so that they have a full outer shell.

Answer:

????

Explanation:

where's the question

Answer:

C. 6

Explanation:

The atomic number of a number is related to the number of protons in the nucleus.

Answer: A and C

Explanation:

Low tides occur in locations at 90 degree angles to the moon. Tidal cycles have the same length as the lunar day, 24 hours and 50 minutes. In this time span, most locations will experience two high tides, when the location is close to and far from the moon, and two low tides. Sides A and C are angled 90 degrees from the moon.

Hence, low tides are located at A and C.

Answer:90 degree angles to the moon.

Explanation:

Answer:

29 percent of federal R&D money goes to universities, 29 percent goes to industry, and another 29 percent goes to researchers who work directly for federal agencies. About 10 percent goes to federally funded labs operated by private contractors.

Answer:

Explanation:

Funding from the government greatly affects the scientific research as a research can take number of years to complete. During this time period lot of financial support is required as there might be lot of expensive chemicals or substance that the scientist requires for his research.

Answer:

cannot be broken down further

Answer:

from,

moles,n = number of particles, N

Avogadro constant

N = 8.27 * 6.022×10^23

N = 4.98 × 10^ 24particles.

In 8.27 moles of SiH, there are

4.98 × 10^24particles.

Answer:

minerals

Explanation:

Hope this helps

Answer:

CO2 AND H20 I THINK IM 99 PERCENT SURE

Answer:

The size of an atom can be estimated by measuring the distance between adjacent atoms in a covalent compound. The covalent radius of a chlorine atom, for example, is half the distance between the nuclei of the atoms in a Cl2 molecule.

Answer:

The water cycle consists of three major processes: evaporation, condensation, and precipitation. Evaporation is the process of a liquid's surface changing to a gas. In the water cycle, liquid water (in the ocean, lakes, or rivers) evaporates and becomes water vapor.

Explanation:

Answer:

So oxidation reactions need not involve oxygen. This redox reaction is actually the sum of two separate half-reactions (a reduction half-reaction and an oxidation half-reaction).

The oxidation reaction does not require oxygen as a reactant. An atom, molecule, or ion loses one or more electrons during the chemical process of oxidation, increasing its positive charge.

When electrons are lost or the oxidation state increases, it is called oxidation; when they are gained or the oxidation state decreases, it is called reduction.

A molecule is said to be oxidized when oxygen is added to it or when hydrogen is taken out of it. Reduction is the process of introducing hydrogen or removing oxygen from a molecule.

An element is oxidized if it loses electrons, which is another definition of oxidation. Any electron acceptor can oxidize an element by taking in the lost electrons, hence oxygen is not a necessary component in oxidation.

The process of converting glucose into ATP requires oxygen. For each glucose, the first step only releases two molecules of ATP.

Thus, The oxidation reaction does not require oxygen as a reactant.

To learn more about an oxidation, follow the link;

https://brainly.com/question/13182308

#SPJ6

Answer: These are all examples of the waves you listed

B- Soundwave, ultrasound waves

A-Surface ripples on water

C- water waves

D-The heat that we feel from sunlight, a fire, a radiator or a warm sidewalk is infrared.

E-The heat emitted from a campfire.

F-Long Distance Wireless Transmission. Most wireless transmission systems are based on microwave technology.

G- Disinfectants

Explanation:

Hope this helps!!

Have a nice day!

Answer:

1 unpaired electron (s)

Explanation:

At before Duberinor,Mendeleev tried to use atomic weight but they failed .

Answer:c

=

0.0253 M

Explanation:

Molarity is a measure of a solution's concentration in terms of how many moles of solute it contains per liter of solution.

So, in essence, if you have the number of moles of solute, like you do here, and the total volume of the solution expressed in liters, you can find how many moles of solute you get per liter, i.e. the molarity of the solution.

Keeping in mind the fact that the moles of solute are distributed evenly in any given volume of the solution, you can say that because  

7.98 L

of solution contain  

0.202

moles of solute, which in your case is potassium chloride,  

KCl

,  

1 L

of this solution will contain

1

L

⋅

0.202 moles KCl

7.98

L

=

0.0253 moles KCl

So, if your solution contains  

0.0253

moles of potassium chloride per liter, it follows that its molarity is equal to

c

=

0.0253 M

Here  

M

is equivalent to  

mol/L

, or molar.

The molarity of the solution that contains 0.505 mol KCl in 7.98 L of the solution is 0.0632 moles/L.

Molarity is a measure of a solution concentration in terms of how many moles of solute it contains per liter of solution.

Molarity = Moles of solute / Liters of solution

Its unit is mole/L

Given that a solution contains 0.505 mol KCl in 7.98 L of solution

Moles of solute (KCl) = 0.505 mol

Liters of solution = 7.98 L

Then, the molarity will be

M = [tex]\frac{0.505}{7.98}[/tex]

   = 0.0632 moles/L

Therefore, the molarity of the given solution is 0.0632 moles/L.

Learn more about molarity here:

https://brainly.com/question/9118107

#SPJ2

Answer:

location 2

Explanation: